搜索结果: 1-15 共查到“理学 lifetime”相关记录42条 . 查询时间(0.141 秒)
CMS homes in on Higgs boson’s lifetime（图）
CMS 希格斯玻色子 寿命
2023/5/26
The Higgs boson doesn’t stick around for long. Once it is created in particle collisions, the famed particle lives for a mere less than a trillionth of a billionth of a second or, more precisely, 1.6 ...
Once-in-a-lifetime floods to become regular occurrences by end of century（图）
Once-in-a-lifetime floods regular occurrences century
2020/12/18
Superstorm Sandy brought flood levels to the New York region that had not been seen in generations. Causing an estimated $74.1 billion in damages, Sandy was the fourth costliest U.S. storm behind Hurr...
Genetic relationship between type traits, number of lactations initiated, and lifetime milk performance in Czech Fleckvieh cattle
dairy cows longevity lifetime performance conformation traits
2017/12/25
Genetic relationship was analyzed between type traits and longevity measures in dual-purpose cattle. Data from 91 486 Czech Fleckvieh cows first calved between 2003 and 2009 were used. Longevity was d...
Genetic relationship between type traits, number of lactations initiated, and lifetime milk performance in Czech Fleckvieh cattle
dairy cows longevity lifetime performance conformation traits genetic correlation
2018/3/5
Genetic relationship was analyzed between type traits and longevity measures in dual-purpose cattle. Data from 91 486 Czech Fleckvieh cows first calved between 2003 and 2009 were used. Longevity was d...
Cortex,countercurrent context,and dimensional integration of lifetime memory
Context corticocortical connections countercurrent hippocampus latent semantic analysis life history strategies neocortex
2015/7/30
The correlation between relative neocortex size and longevity in mammals encourages a search for a cortical function specifically related to the life-span. A candidate in the domain of permanent and c...
A Distributed Algorithm with Linear Convergence for Maximum Lifetime Routing in Wireless Networks
Linear Convergence Lifetime Routing
2015/6/19
A wireless sensor network of nodes with limited energy is considered. The problem of computing a routing flow that maximizes the network lifetime is formulated as a linear program. We consider a conve...
Distributed Algorithms for Maximum Lifetime Routing in Wireless Sensor Networks
Wireless Sensor Networks Maximum Lifetime
2015/6/19
A sensor network of nodes with wireless transceiver capabilities and limited energy is considered. We propose distributed algorithms to compute an optimal routing scheme that maximizes the time at whi...
New physics contributions to the lifetime difference in D-0-(D)over-bar(0) mixing
New physics model light quark mass
2014/12/20
We present the first general analysis of New Physics contributions to the D0-D̅ 0 lifetime difference (equivalently ΔΓD). We argue that New Physics (NP) contributions to |ΔC|=1 processes can domi...
The Effect of Age at First Calving and Calving Interval on Productive Life and Lifetime Profit in Korean Holsteins
Age at First Calving Calving Interval Lifetime Profit Productive Life
2016/5/12
This study was performed to estimate the effect of age at first calving and first two calving intervals on productive life and life time profit in Korean Holsteins. Reproduction data of Korean Holstei...
Enhancement of Blackbody Friction due to the Finite Lifetime of Atomic Levels
Blackbody Friction Finite Lifetime of Atomic Levels Atomic Physics
2012/5/17
The thermal friction force acting on an atom moving relative to a thermal photon bath is known to be proportional to an integral over the imaginary part of the frequency-dependent atomic (dipole) pola...
Stellar lifetime and ultraviolet properties of the old metal-rich Galactic open cluster NGC6791: a pathway to understand the UV upturn of elliptical galaxies
Stellar lifetime ultraviolet properties old metal-rich Galactic cluster NGC6791 UV upturn elliptical galaxies
2012/2/23
The evolutionary properties of the old metal-rich Galactic open cluster NGC6791 are assessed, based on deep UB photometry and 2Mass JK data. For 4739 stars in the cluster, bolometric luminosity and ef...
Breakdown of the photon lifetime concept in optical cavities with negative group delay
the photon lifetime optical cavities negative group delay
2011/8/18
Abstract: The concept of photon lifetime in a cavity is shown to be non-relevant in the case where the cavity round-trip group delay is negative due to the presence of a strong intracavity negative di...
Ultrafast Internal Conversion in Ethylene I. The Excited State Lifetime
Ultrafast Internal Conversion Photochemical reactions
2011/8/29
Using a combined theoretical and experimental approach, we investigate the non-adiabatic dynamics of the prototypical ethylene (C2H4) molecule upon π → π* excitation. In this first part of a two part ...
Thermal evolution and lifetime of intrinsic magnetic fields of Super Earths in habitable zones
Thermal evolution intrinsic magnetic fields
2011/1/11
We have numerically studied the thermal evolution of various-mass terrestrial planets in habitable zones, focusing on duration of dynamo activity to generate their intrinsic magnetic fields, which may...
Emergence of Periodic Structure from Maximizing the Lifetime of a Bound State Coupled to Radiation
Analysis of PDEs (math.AP) Mathematical Physics (math-ph) Optimization and Control (math.OC) Pattern Formation and Solitons (nlin.PS)
2010/11/11
Consider a system governed by the time-dependent Schr\"odinger equation in its ground state. When subjected to weak (size $\epsilon$) parametric forcing by an "ionizing field" (time-varying), the stat...